Antenna



FIG. 1 is perspective view of an antenna showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is a perspective view thereof in its normal use.

Dashed lines in each drawing figure are intended to show environment ofuse and form no part of the claimed design.

The ornamental design for an antenna, as shown and described.